Haploid yeast cells secrete protein signals known as pheromones, which induce mating between opposite mating types.

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Root Structure and Function

The structure of root to Perform three major function;

Absorbing water and minerals

Anchoring and supporting the plants

Storing food

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In Meristematic zone, 

cells divide both in the direction of the root base to form cells that will differentiate into the tissues of the functional root and in the direction of the root apex to form the root cap

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Cell division in the root apex proper is relatively slow; thus, this region is called the quiescent center

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In elongation zone, cells elongate rapidly and undergo a final round of divisions to produce a central ring of cells called the endodermis